The G-20 was created to deal with the global financial and economic crisis of 2008. G-20 leaders were successful – the crisis was contained. Should the G-20 leaders move on to deal with the most difficult and hitherto intractable global environmental policy issues? The United Nations has not...

We describe a model of international, multidimensional policy coordination where countries can enter into selective and separate agreements with different partners along differentpolicy dimensions. The model is used to examine the implications of negotation tie-in - the requirement that...